NEW YORK — The last time the Nets faced the Knicks, they were without Deron Williams and Paul Pierce due to injury, and a fully healthy New York squad thumped Brooklyn back on Dec. 5 at Barclays by a 30-point margin.

A little more than a month later, things have completely changed for both sides.

The Nets have been on a roll since the calendar turned to 2014, and they got Williams back in time to blowout the Knicks 103-80 in a Monday matinee at Madison Square Garden to improve to 7-1 in the new year.

Not that they needed him.

Brooklyn has been using excellent ball movement and riding Joe Johnson during this recent stretch, whose big early scoring performances have gotten the Nets out to some very fast starts. And the team has been stronger defensively with Shaun Livingston and Alan Anderson at the guard spots, so Williams kept continuity, and made the easy decision to come off the bench.

“It was my idea,” he said afterward. “Just because we had been playing so well with that lineup, why shake things up? It doesn’t matter if I come off the bench, start, whatever. The way [Joe Johnson] has been playing in first quarters, first halves, I don’t want to disrupt that.”

Johnson had 12 points on 5-of-8 shooting in the game’s first 12 minutes, and the Nets had opened up an 11-point lead by the time the first quarter was finished.

Paul Pierce knows a thing or two about going from a starting to a reserve role, having had to deal with that for the first time in his career with the Nets earlier this season. It was tough on Pierce at the time, but he believes that while it will be an adjustment for Williams if it continues, he’s more than capable of figuring it out.

“I haven’t come off the bench my whole career until recently, but I think it’s a mental adjustment,” Pierce said. “It’s just something you’ve got to figure out, and it’s totally different when you’ve been playing your whole life in the starting lineup. You have to have a different mental approach, you have to be ready as soon as you come in — it’s just a different type of preparation, I think. He’s a smart player, he understands the game, and he can figure it out, whether he continues to come off the bench or until he returns to the starting lineup.”

While the Nets have gotten healthy (minus Brook Lopez, of course, who is expected to be out the rest of the season with a foot fracture), they’ve also begun to come together as a team. Andray Blatche, who played well when the game was out of hand for the second straight contest and finished with 19 points and 12 rebounds, says the defense is what’s made the difference.

“It’s our effort on defense and we’re trusting one another on defense,” Blatche said. “We’re talking, and things are working out for us. We’re hanging our hat on defense first.”

Kevin Garnett echoed those remarks, and credited Jason Kidd for getting his message to the team across in terms of what the expectations are in defensive situations.

“We’re not guessing anymore,” Garnett said.

On the Knicks side, they’re missing two key rotation big men in Kenyon Martin and Amar’e Stoudemire, but the problems seem to run deeper than simply available personnel. The defense is a joke at times, and Carmelo Anthony rarely gets any consistent help offensively beyond high-volume, low-percentage shooting from his teammates.

The Knicks and the Nets traded plenty of jabs through the media following the offseason acquisitions of Pierce and Garnett, but Brooklyn wouldn’t place any special emphasis on this victory afterward. Pierce was among those exchanging the playful remarks, but at this point he’s focused on how Williams’ return can help impact this team as it tries to live up to those lofty preseason expectations.

“We need Deron,” he said. “No matter how we’ve been playing, at the end of the day if we’re going to make some noise here in the East, we need what he’s able to do.”

“I know there was a lot of talk in the preseason about the rivalry, you know, the inner-city battle,” Pierce said. “But us as a team, at this point we’re looking at the big picture. We’re looking at how we’re going to develop, how we’re going to get better and how we’re going to continue to move up in the East.”

You probably answered “the Clippers.” Most fans do. So do most NBA referees — And everyone else. Which is why after a recent loss to Golden State, veteran Marreese Speight (a Warrior last season) pointed to the Clippers complaining about the officiating as part of the problem.

He went on to say that the scouting report is you can get in the Clippers’ heads by knocking them around a little. Which seems pretty obvious when you watch teams play them. Shockingly, Clippers coach Doc Rivers disagrees with that. Via NBCLosAngeles.com.

“The officiating thing, I don’t think, is our issue. I will say that,” said Rivers about the technical fouls. “If that were the problem, then, Golden State would be struggling. They’ve been No. 2 the last two years in techs, too. I think we need to point fingers in another direction than that.”

Doc may not like it, but Speights is right.

The Warriors do complain too much, but they also have a ring so more is forgiven. The problem for the Clippers is that reputation for complaining starts with Rivers — he complains as much or more than any coach in the league. Then it filters down through Chris Paul and Blake Griffin.

Is it fair that more is forgiven with winning? Moot question. Welcome to America. The Clippers complain a lot and have yet to get past the second round with this core. And at times there standing there complaining to the referees does get in the way of them getting back into defense, and they seem to go in a funk.

The Pelicans are disappointing this season — it is Anthony Davis vs. the world down there. Which is the main reason they are 7-16 this season. While things have gotten better since Jrue Holiday‘s return, Davis is averaging a league-best 31.4 points per game, it then drops off to Holiday at 15.4, and then E'Twaun Moore at 11.1.

When a team struggles, usually that is a bad sign for the coach. Not because it’s always their fault, but because GMs choose not to fire themselves for poor roster construction. Which leads to the question: Alvin Gentry, are you concerned about your job? (Warning, NSFW)

New Orleans’ struggles are not on Gentry, certainly not completely. He’d like a roster that can play uptempo, that has depth. What he got instead was a good point guard, an elite 4/5, a rookie in Buddy Hield that maybe pans out down the line, and then… nada. And the roster Gentry has often is banged up.

If anyone is in trouble, it is GM Dell Demps. Remember, Danny Ferry was hired last summer for the vague role of “special advisor.” Gentry is in his second year, and the issue is the roster he was given. But the Pelicans are a patient organization that values continuity, so… who knows. But the clock is ticking on Davis;, it’s years away, but the Pelicans need to build a team around him and are far from that right now.

Jones told the Beacon Journal he will retire after next season, which will be his 15th in the NBA. His ultimate dream is to ride off after three consecutive championships in Cleveland

“I know playing 15 years is a number where I can look back and I can be like, ‘I accomplished something,’ ” Jones said. “Fourteen vs. 15 may not be much, but to be able to say I played 15 years, that’s enough for me to hang ’em up.”

Jones’ contract expires after the season, so the Cavs will have a say in whether he returns. Safe to say if LeBron wants him back, Jones will be back.

But the Heat got into trouble relying on washed-up veterans around LeBron, wasting valuable roster spots on players who could no longer contribute.

Is that Jones? Not yet. Though he’s out of the rotation, he has still made 11-of-12 open 3-pointers this season. There’s a role for him as spot-up shooter when Cleveland needs one.

Still, the Cavaliers ought to be mindful of Jones’ likely decline over the next year and a half. Plus, it’s not a certainty he holds to his timeline. Cavs veterans have a history of changing their mindon retirement.